Related Questions

Consider the following statements regarding genetic code and choose the correct answer:
1. The genetic code is degenerate
2. In all amino acids the first two bases are the same in all the codons that represent a particular amino acid
3. The number of codons an amino acid can claim is proportional to the frequency of the amino acid in proteins
4. Amino acids with codons ending in U or A also have codons ending in C or G respectively
Consider the following statements.
1. A large amount of caffeine is found in coffee seeds.
2. Alkaloid present in tobacco in nicotine.
3. Theobromine is the primary alkaloid found in cocoa and chocolate.
Which of the statements given above are true?
Analysis of a hexapeptide using enzymatic cleavage reveals the following result:
• Amino acid composition of the peptide is: 2R, A, V, S, Y
• Trypsin digestion yields two fragments and the compositions are: (R, A, V) and (R, S, Y)
• Chymotrypsin digestion yields two fragments and the compositions are: (A, R, V, Y) and (R, S)
• Digestion with carboxypeptidase A yields no cleavage product.
Given: Trypsin cleaves at carboxyl side of R. Chymotrypsin cleaves at carboxyl side of Y. Carboxypeptidase A cleaves at amino side of the C-terminal amino acid (except R and K) of the peptide.
The correct amino acid sequence of the peptide is:
In an experimental study of the effects of a new drug on depression a double-blind control technique is used, which of the following persons should not be informed as to which drug, experimental or placebo is being administered to each individual research participant?
1. Research participants in the experimental group.
2. Research participants in the control group.
3. Persons administering the drug.
4. Persons evaluating the drug effect.
Select the correct answer:
A drug was sold by an auction and according to the usage of trade it was to disclose in advance of any vast damage caused in the quality of the drug but such disclosure was not made and the drug was found to be defective. This is an example of:
The common amino acids are also called as alpha-amino acids because they contain their amino group attached to the alpha carbon.
The peptide formation involves two amino acids covalently joined together between the carboxyl group of one amino acid and the amino group of another.
PROTPARS counts the minimum number of mutations to change a codon for the first amino acid into a codon for the second amino acid, but only scores those mutations in the mutational path that actually change the amino acid.
A drug that is highly effective in treating many types of infection can,at present,be obtained only from the bark of the ibora , a tree that is quite rare in the wild. It takes the bark of 5000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibore's extinction. Which of the following,if true, most seriously weakens the arguments above ?
Factors altering the binding of the drug to the blood increases the volume of distribution of the drug and the factors that influence drug binding to the extravascular component decreases the volume of distribution.